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N235-H_2SO_4萃取分离锆铪流程的改进主要有以下几方面:(1)有机相组成及浓度的改进。N235浓度由原来的50％降为20％,添加剂由二辛醇(或仲辛醇)改用β-支链伯醇(A1416);(2)洗涤条件的改进。将H_2SO_4洗涤改为锆洗和酸洗;(3)由高酸萃取、洗涤改为低酸萃取、洗涤;(4)其它工艺参数(料液锆浓度、流比,级数等)的相应改进。经小型连续试验和工业试验表明,改进的N235-H_2SO_4流程技术先进,产品纯度高,质量稳定,锆萃取率达94.7％,萃取分相好,设备产能大,操作简单,污染小,可作为分离锆铪制备原子能级ZrO_2的生产流程。
N235-H_2SO_4 extraction and separation of zirconium and hafnium process improvements mainly in the following aspects: (1) organic phase composition and concentration improvement. The N235 concentration was reduced from 50% to 20%. The additive was changed from dioctanol (or secondary octanol) to β-branch primary alcohol (A1416). (2) Improvement of washing conditions. H 2 SO 4 was changed to zirconium wash and pickling; (3) extraction was switched from high acid to low acid and washed; (4) Corresponding improvement of other process parameters (zirconium concentration, flow ratio, series, etc.) . The small continuous experiment and industrial experiment show that the improved N235-H2SO4 process has advanced technology, high product purity and stable quality. The extraction rate of zirconium is 94.7%, the extraction phase separation is good, the production capacity is large, the operation is simple and the pollution is small. Production of Atomic Energy Level ZrO_2 from Hafnium.